www.time.com.kh has no MX records.
Question and response
Question
dig www.time.com.kh. MX
Answer
The response has no answer records.
Authority
time.com.kh. 3600 SOA blue.foundationdns.com. dns.cloudflare.com. 2395842291 34600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0